Tooth Sensitivity After a Filling: What's Normal and When to Worry

It's not uncommon to experience some tooth sensitivity after getting a filling. For most people, this is temporary and resolves on its own. Here's what to expect and when you should contact your dentist.

Why Teeth Become Sensitive After Fillings

When a cavity is treated, the dentist removes decayed tooth material and places a filling. This process, while necessary, can temporarily irritate the tooth's nerve. The nerve needs time to settle down and adjust to the new filling.

Several factors can contribute to post-filling sensitivity:

• The depth of the cavity - deeper fillings are closer to the nerve
• The type of filling material used
• Slight changes in your bite that put pressure on the filled tooth
• Inflammation of the pulp (nerve tissue) from the drilling process

What's Normal After a Filling

Some sensitivity is completely normal and expected. You may experience:

• Sensitivity to hot and cold – This usually diminishes over a few days to weeks.
• Sensitivity to pressure – Biting down may feel different initially.
• Sensitivity to sweet foods – This typically improves quickly.
• Mild discomfort – Some tenderness around the tooth is expected.

These symptoms usually resolve within 2-4 weeks as the tooth heals.

When to Contact Your Dentist

While some sensitivity is normal, certain symptoms warrant a call to your dentist:

• Sensitivity that gets worse rather than better over time
• Sharp, spontaneous pain that occurs without a trigger
• Pain that keeps you awake at night
• Swelling of the gum or face
• Fever or feeling unwell
• A filling that feels "high" when you bite - your bite should feel normal
• Sensitivity lasting longer than 4-6 weeks

Managing Sensitivity at Home

While waiting for sensitivity to subside naturally, you can:

• Use a sensitivity toothpaste – These contain compounds that help block pain signals.
• Avoid extreme temperatures – Stick to lukewarm foods and drinks for a few days.
• Chew on the other side – Give the filled tooth a brief rest from biting pressure.
• Take over-the-counter pain relief – If needed, as directed on the packaging.
• Brush gently – Use a soft-bristled brush around the treated area.

The Bottom Line

Mild sensitivity after a filling is normal and usually temporary. Most people find their symptoms improve steadily over a few weeks. However, if pain is severe, worsening, or accompanied by other symptoms, don't hesitate to contact your dentist. It's always better to have concerns checked early.